#include<stdio.h>
int main()
{
    int fahr, lower, upper;
    double celsius;
    
    scanf("%d %d",&lower,&upper);
    if(lower<= upper)
	{
        printf("fahr celsius\n");
        for(fahr = lower ; fahr<= upper; fahr++)
		{
            celsius = (5.0/9.0)*(fahr,celsius);
}
    }
	 else {
            printf("Invalid Value!\n");
        }
        return 0;
}
